The first major exposition of this great twentieth-century Christian thinker's spirituality. Teilhard de Chardin, Jesuit priest and scientist, left modern Christians the legacy of his attempt to reformulate Christian truth in contemporary thought. In this new book, the author draws from previously unknown diaries, retreat notes, and letters to develop his unique vision of Teilhard's spirituality, which "calls people to unite in love with the risen Jesus Christ, and in him-with one another-to take responsibility for the world Christ came to save."